Attachment for shell-stitching machines.



F. CHATFIELD. 1 ATTACHMENT FOR SHELL STITCHlNG MACHINES.

APPLICATION FILED JAN,2.19 -2. h 1 144 81 Q Patented June 29, 1915.

. I 4 SHEETS-SHEET I.

F. CHATFSELD. ATTACHMENT FOR SHELL STITCHING MACHINES.

APPLICATION FILED JAN. 2, 1912. l l%%1@a Patented June 29, 1915.

I p 4 SHEETSSHEET 2- gray/vs Y v F, CHATFIELD. ATTACHMENT FOR SHELL STITCHING MACHINES.

APPLICATION FILED JAN.2,1912.

1,14%,81 0@ v Patented June 29, 1915.

4 SHEETS-SHEET 3 F. CHATFIELD ATTACHMENT FOR SHELL STTTCHTNG MACHINES.

Patented June 29 1915.

4 SHEETS-SHEET 4 M mm" I APPLICATION FILED JAN-2, T912.

' arnie.

FRANKLIN GHATFIELD, F "MINNEAPOLIS, MIXil'NESGTA, ASSIGNOR T0 NORTHWESTERN KNITTING COMPANY, OF IMINNEAE'ULIS, I'IL'INNESDTA, A CORYORATION.

ATTACHMENT FDR SHELL-STITCEING- MACHINES.

. Specification of Letters latent.

Application filed January 2, 1912. serial No. 669,082.

T 0 whom it may concern:

Be it known that I, FRANKLIN CHATFIELD, of lllinneapolis, Hennepin county, Minne sota, have invented certain new and useful Improvements in Attachments for Shell- Stitching' Machines, of which the following is a specification.

'My invention relates to devices for inserting ribbons between the shell. chain stitches and the edge of the fabric. These ribbons are usually fed between the stitches U? and the garment under the presser foot of the machine and considerable time is required to insert the ribbon in the proper position for feeding and there is always considerable danger of the ribbon being caught and sewed fast. I have also found that considerable time was wasted in re moving the ribbon. from the feeding posi-' tion when it was desired to form the shell stitch without the ribbon and reinserting the ribbon when a part of the garment was reached where its use was desirable.

The object, therefore. of my invention is to simplify and expedite the operation of placing the ribbon in. position to be fed be tween the shell stitches and the fabric. or. setting it in a position where the stitches will be formed without the ribbon.

Other objects of the invention will appear from the following detailed description.

The invention consists generally'in various constructions and combinations, all as hereinaftcr described and particularly pointed out in the claims.

.In the accompanying drawings forming part of this specification, Figure 1 is a front view, partially in section, of a portion of a shell stitching machine with my invention applied thereto, Fig. 2 is a plan view, partially in section, showing the relative positi on of the parts, Fig. '3 is a sectional view on the line,m'm of Fig. 1, Fig". 4 is a side 'view of a shell stitching machine and the attachment applied thereto, showing the ribbon guide in its operative position, Fig.

5 is a similar view, showing the guide in its inoperative position, Fig. 6'is a detail sectional view, showing the mechanism for operating the ribbon gzuide, said guide being shown in its working positionfl ig. 7 is a to insert the ribbon in the shell stitch, Fig. 10 is a detail sectional view, illustrating the adjustment of the fabric guide in position to increase the depth of the bight of the stitches.

In the drawing, 2 represents the frame of the machine, and 3 the work table. needle, 5 the pre'sser foot and 6 the recipro' cating hook which coiiperates with the needle to form the stitch. These parts are all in use with the ordinary shell stitching machine.

7 is a plate secured to the machine frame and 8 is a second plate between which and the plate 7 a guide-way is formed. In this guide-way is a slide 10. A pin 11 is mounted inthe plate '7 and projects into an opening 12 in the slide 10 in which a, spring 13 is arranged. The tension of this spring normally tends to hold the slide in its retracted position against the pin 11, shown in Fig. 10. A. fabric guide 1 1 is mounted on the slide 10 and provided with a rearwardly projecting end 15 having a vertical slot 16 that is adapted to receive the laterally projecting pin 17 on the presser foot. fhis pin bridges the gap between the presser foot and the fabric guide and prevents thefabric and the fuzz thereon from entering this gap when the of this spring until the desired bight of the stitches is obtained.

Various devices may be employed for or?- eratins: the fabric guide, but 1 prefer to provide the mechanism which 1 will now de described the guide can be adjusted. toward or from the presser foot against the tensionv end of said sleeve and has a split lower portion provided with a clamp screw 24 for securing the plate 23 on said sleeve. The upper portion of said plate has a transverse slot 25 to receive a pin 26 that is carried by the slide 10 and projects outwardly through a slot .27 in the plate 8. hen. therefore,

pressure is applied to the pin 26 the slide 10 will be pushed outwardly to move the fabric guide toward the presser foot to change the bight of the stitches.

I make no claim to this fabric guide in this application, as it forms the subject of lever to allow adjustment thereof and alocking screw 31 forholding the set screw in place. The outer end of the sleeve 19 has a finge ngrip- 32 and upon said sleeve a collar 33 is mounted, having a finger grip 34. A pin 35 is mounted on said collar and projects between the lever 29 and the plate 23, so that when the collar 33 is rotated, the

pin 35 will be pushed between the levegfg and the plate 23 to rock the said lever force the pin 28 inwardly against the pin 26, or withdrawn from engagement with the lever 29 to allow the fabric guide spring to withdraw the fabric guide from contact with the presser foot and increase the bight of the stitches, as shown in Fig. 10.

35 represents the ribbon guide, having one end adjustably mounted by means of the set screw 36 in the upper portion of the plate and its opposite end provided with v a cylindrical. portion 37 into which the ribbon is threaded and guided thereby in a cylindrical form between the shell stitches and the edge of the fabric. A chaining finger 38 has a recess or depression 39 therein to receive the cylindrical portion 37 of the ribbon guide, as indicated in Fig. 6, so that the feed of the ribbon will be sufficiently low with respect to the chaining finger to prevent any possibility of the ribbon being caught by the hook 6 in the for D'lfltlOIl of the shell or chain stitch. This ribbon guide is capable of movement to an operative or inoperative position. as shown in Figs 6 and 7,-by the adjustment of the sleeve 19 and the plate 23. I prefer to use the plate chaining finger shown herein provided with the recess or depression. but obviously an opening or slot might be formed in the plate instead of the recess. The function of such slot or opening would be the same as the recess shown. This plate 23 is provided on its lower end with a lug 40 that is adapted to enter a notch-41 in a horizontal plate 42 that is secured to the plate 7 This notch has a beveled edge 43 with which the lug 40 contacts, as shown in Figs. 3 and 6. \Vhen the lug 40 enters the notch 41 the lower portion of the plate 23 will be rocked on the stud 18, throwing the upper portion of said plate toward the presser foot and tilting the ribbon guide to its proper ribbon feeding position, as shown in Fig. 2, the cylindrical portion of the guide resting in the recess 39. When it is desired to swing the ribbon guide to an inoperative position, the lug 40 is withdrawn from the notch 41 and allowed to slide along the edge of the plate 42 into the slot 44, the sleeve 19 sliding inwardly on the stud 18 and carrying the plate 23 with it and swinging the ribbon guide to an inoperative position, as indicated in Fig. 7. The ribbon can then be cut with a loose end of sufficient length for forming a bow.

\Vith this device the ribbon guide is always threaded. the ribbon is supported close to the chaining finger ready to be set in an operative position to feed the ribbon within the chain stitch, and all the labor and annoyance of inserting the ribbon under the presser foot and the danger of having the ribbon caught by the stitch forming mechanism. is entirely avoided.

Furthermore, with this device the length of the loose ends suitable for tying a bow can be easily determined, and the ends made of uniform length.

I claim as my invention 1. In a stitching mechanism, a work table, a presser foot, and a chaining finger mounted in said work table beneath said presser foot and having a recess in its upper surface, and a guide fitting into said recess.

2. The combination, with a shell stitching machine, a work table. and a presser foot, of a fabric guide movable toward and from said presser foot, a chaining finger, a ribbon guide movable toward and from said chaining finger, and mechanism for operating said fabric guide and said ribbon guide simultaneously. i

3. The combination, with a shell stitching mechanism, apresser foot and work table, of a fabric guide movable toward and from said presser foot. a movable ribbon guide, and mechanism for operating said fabric guide and said ribbon guide simultaneously or independently of one another.

4. The combination. with a stitching mechanism, a presser foot and work table, of a recessed chaining finger and a movable guide adapted to enter said recess.

5. The combination, with a. stitching mechanism, of a recessed chaining finger, a.

movable ribbon guide having a part at one end to receive a ribbon and adapted to enter s I ,J 131s ribbon outsms pox-h of sad .11 1g mechanism The combimr tio z wish a s'nsil stiizshing 15a11ism; of :1 pi; having a, sliding and as movsmsni". on its suppors a, ribbon guide carried by ssici-piziizs, and means for opemtlop; ssici plate to move saici guide, to

operative or inopemtivs position.

7. The r:ombinsiion. 7 22 shsii stifiaing zrzschine, of pro therefrom, a. siseve s'iidsbie on. said s gring mount s i on ssici stud anti tending to said sleeve inwardly izhszroon, a plate secured to said stud midi movable ini'ierewith, means sngaging said for holding ii.- aid said sleeve against ths tension of said spring, and a ribimng'uids carrimi by said to d :1" vi, she tsnsiiri ing she ciis- Q M gamma: of sis irom ssici fin i the momma siiom "t sion said i 321 .gmd: to 'tiisil 9. Tim on: FY31 mechanism 4 with s sheli stitci1- msiudmg aging;

-d s, hsrizontn as hook ooopsmiing oi a part ad acem to so;

.o-wing; 2a recuss L i I nxrvrzirio 'lDJliltiOH, WiLil :1. Work table 00%;, a needle and book 6&-

' :20 one another on said fssbis Wsbis toward on. and sparsims palq of ssi ,I..'i so sax? needs ans 11. The combination, with a, machine frame, and a strtcmng mechanism, of a stud mounted in said frame, a spring-pressed 55 member having a sliding movement on said $521 152, a ribbon guide carried by saici member min moved thereby from its inopemisivs so operative position, and means for locksaid member and guide in such posifiions. S0 12. The combination, with a frame and a ssitching mechanism, of a sliding sleeve, 2, 1650011 guide carried by said sleeve, the movsmsnt of said sleevo in one iirec'iaioto. shifting said ribbon guide fron'l an inopvs srative position so an opsrativs position, nd the movement of said sissvs in tbs 0 5?: direction shifting said ribbon guide; from an operative to an inoperative position, and a, spring for normally holciitn ssi sies'vs and guide 121 said latter PGSZMQKI.

TR 1: f W3: n *wmn 9 i Q lb. Me com mm ion, "10;; W MM, on w stitching mechanism, 0:; a v ssm frame, a slews s it a member mounted on sieeve, guis having an angular mm moi iii-:3. men-1 091;" Mimi mova bllo tins; means iocking of its outward movcn'isni.

14-. The combination, mechanism" of a chsinin, Q recess or depression in i s "apps w" anti :2 mm'abie gniis fitting Within ssis The com binmion, W mechanism smi a pre tsbie, g guide fifii q inks said mombie iiisssin.

by downward posltlon sch-seem :0 said m 1!bi7OZ1.Z111Ci8 so an upward 270M" mom; foiioweti by :1 backwasci. movsm Pet! sci 1t from its Working p051 on, s ciminzpg f nger im mg an opening; iii W em szuci ggmdo l8 movable, in Witness whereof, I have my hand this 28m day of Decenniasz:

FRAI FZQLJN CHAIEFZ.

'W'iimsssss m3 .1 Iii. Sosmrsmx, Exams Ai /m1. 

